Thermal stability of Ag-exchanged clinoptilolite rich mineral

被引：24

作者：

Akdeniz, Y. ^{[1
]}

Ulku, S. ^{[1
]}

机构：

[1] Izmir Inst Technol, Fac Engn, Dept Chem Engn, TR-35437 Izmir, Turkey

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2008年 / 94卷 / 03期

关键词：

Ag-clinoptilolite; heating rate; microwave; particle size; thermal stability;

D O I：

10.1007/s10973-008-9358-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Thermal stability of clinoptilolite rich mineral from Western Anatolia, Turkey and its Ag-exchange forms was investigated. Parent mineral of different sizes were heated up to 1000A degrees C with heating rate of 2 and 10A degrees C min(-1) using differential thermal analyzer (DTA) and thermogravimetric analyzer (TG). Ag exchange was conducted both in conventional constant temperature waterbath and microwave at 40, 60 and 80A degrees C. The exchanged minerals were then characteized by scanning electron microscopy (SEM), X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR), DTA and TG. The particle size and heating rate do not have significant effect on the thermal behavior of the parent mineral and no structural changes were observed with Ag exchange, only decomposition temperature was lowered. It was finally concluded that, Ag-exchanged clinoptilolite rich minerals were less thermally stable compared to parent mineral that does not affect their use for possible applications.

引用

页码：703 / 710

页数：8

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